I have a 450 Pro with BeastX, 65MG's and Align M motor. With my previous setup I was using the Align ESC and seperate Castle BEC. I replaced the with Kontronik Koby 40 and was told I no longer need to use the seperate BEC. I am kinda on the fence of which way I should go with it. Any info would be much appreciated.

This is the answer I have been looking for!Thank you very much for the reply, I have just hovered around the house and all seems fine but not had a chance to go out and throw it around. I will follow up with my results.
Thanks again

Used a koby 90 in my 550 with align ds610's and a 650 on tail and the internal bec was fine! Did the fast pitch pump test on the ground for about 10 seconds to see if i could make my rx lights flash (spektrum rx lights flashing signifies a brown out, voltage drop below 3.5v).